华北老牛筋 hua bei lao niu jin

Arenaria formosa Fischer ex Seringe var.angustipetala Maximowicz.

Herbs perennial. Principal roots slender, woody; rootlets fibrous. Stems densely clustered, erect, 4--10 cm, glandular pubescent distally, with dense, withered, persistent leaves at base. Basal leaf blade linear, 1--3 cm × 0.5--1 mm, glabrous, midvein impressed, base membranous, sheathing, apex acute; cauline leaf blade lanceolate, 3--5 mm, base broadened, margin narrowly membranous, apex acute. Flower solitary, terminal; bracts lanceolate, 3--4 × ca. 1 mm, base broadened, margin membranous, ciliate, apex obtuse or acute. Pedicel 3--10 mm, densely brown glandular hairy. Sepals 5, ovate-oblong, 4--5 × 2--2.5 mm, glandular hairy abaxially, margin narrowly membranous, apex obtuse or acute. Petals 5, white, obovoid-saccate, 5--7 × 1.5--2 mm, base attenuate, cuneate, apex obtuse. Floral disc saucer-shaped, with 5 orbicular glands. Stamens 10; filaments ca. 5 mm; anthers yellow. Ovary stipitate, obovoid, ca. 1.5 mm. Styles 3, ca. 2 mm; stigmas clavate. Fl. Jul.

* Alpine meadows; ca. 3000 m. Hebei, Nei Mongol, Shanxi.